WirelessUSB使PC外設、游戲控制器、遙控、玩具及其他任何點到點或多點到單點應用都能實現無線連接，并以低成本的2.4-GHz無線解決方案取代有線連接。WirelessUSB系統起著USB人機接口設備(HID)的作用，因此無線連接在操作系統層面上對設計人員是透明的（無需驅動程序）。
基于WirelessUSB的HID解決方案能很好地在用戶體驗，成本下降和電池壽命的延長方面做出平衡。此外，WirelessUSB還可在各種其它應用（非USB）中實現簡便而具有高性價比的無線連接，其中包括工業、消費類電子和醫療類型市場。WirelessUSB LS(TM)是一種10米收發器，而WirelessUSB LR(TM)則是50米距離的收發器。賽普拉斯的推出的WirelessUSB LP(TM)器件如CYRF6939 2.4GHz DSSS無線電收發器匯集了極低功耗,長距離(10米以上)和高數據傳輸率(1Mbps-GFSK或250Kbps-DSSS)的特點, 以及附加增值的優點,像自動事務序列處理器,集成的升壓轉換器以及RX & TX緩沖器和AutoRate Receiver (TM)。
WirelessUSB 特性如下：
全球通用
低成本
針對電池供電設備進行了專門優化
雙向/單向操作
多點到單點連接
USB HID兼容性
支持同區域多個鏈接 （co-location）
在噪聲環境下性能穩定
無兼容性方面的問題
The CYRF6936 WirelessUSB™ LP radio is a second generation member of Cypress’s WirelessUSB Radio System-On-Chip (SoC) family. The CYRF6936 is interoperable with the first generation CYWUSB69xx devices. The CYRF6936 IC adds a range of enhanced features, including increased operating voltage range, reduced supply current in all operating modes, higher data rate options, and reduced crystal start up, synthesizer settling and link turnaround times.
主要性能:
2.4 GHz Direct Sequence Spread Spectrum (DSSS) radio transceiver
Operates in the unlicensed worldwide Industrial, Scientific and Medical (ISM) band (2.400 GHz–2.483 GHz)
21 mA operating current (Transmit @ –5 dBm)
Transmit power up to +4 dBm
Receive sensitivity up to –97 dBm
Sleep Current <1 μA
Operating range: 10m+
DSSS data rates up to 250 kbps, GFSK data rate of 1 Mbps
Low external component count
Auto Transaction Sequencer (ATS) - no MCU intervention
Framing, Length, CRC16, and Auto ACK
Power Management Unit (PMU) for MCU/Sensor
Fast Startup and Fast Channel Changes
Separate 16-byte Transmit and Receive FIFOs
AutoRate™ - dynamic data rate reception
Receive Signal Strength Indication (RSSI)
Serial Peripheral Interface (SPI) control while in sleep mode
4 MHz SPI microcontroller interface
Battery Voltage Monitoring Circuitry
Supports coin-cell operated applications
Operating voltage from 1.8V to 3.6V
Operating temperature from 0 to 70°C
Space saving 40-pin QFN 6x6 mm package
應用:
Wireless Keyboards and Mice
Wireless Gamepads
Remote Controls
Toys
VOIP and Wireless Headsets
White Goods
Consumer Electronics
Home Automation
Automatic Meter Readers
Personal Health and Entertainment
CYRF6939簡化方框圖:
下圖是應用電路圖:
下表是應用電路圖中所用的材料清單(BOM):
詳情請參閱CYRF6936數據表:
http://mcuol.com/download/upfile/CDB5560-1_DB1.pdf